Pfizer and BioNTech said that clinical trial data suggested their Covid-19 jab could be effective against the more contagious B.1.351 mutation, which was initially detected in South Africa.
辉瑞(Pfizer)和BioNTech表示，临床试验数据显示，它们研发的新型冠状病毒肺炎（COVID-19，即2019冠状病毒病）疫苗对最早在南非发现、更具传染性的B.1.351变种有效。
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